Both versions of the TCB Ball
come perfectly weighed by design. The weighted TCB balls, for optimum resistance to
develop the muscles both slow and fast twitch. The Hole Ball, to hit
just like hard plastic balls, but throw more like a real ball. The
TCB YH-80 also provides instant feed back to the hitters.

The HOLE Ball is not designed
to be used in any pitching machine, use only for tossing and throwing.